胃癌最主要的转移途径是
A.腹腔内种植
B.直接蔓延
C.淋巴转移
D.血行转移
E.医源性转移
参考答案:C
Michelin is now living on a_______of NT $100 per day. He cannot afford any recreational activities.
A.division
B.restriction
C.measure
D.budget
晶闸管整流电路的换相重叠角与()、()和负载电流有关。